Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Liabilities, Property, Plant and Equipment	$ 6,451,189	$ 6,192,156
Deferred Tax Liabilities, Regulatory Assets	1,003,045	989,405
Deferred Tax Liabilities, Other	206,648	251,107
Deferred Tax Liabilities, Net	8,643,831	8,420,069
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	22,646	116,222
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	79,580	81,226
Deferred Tax Assets, Tax Credit Carryforwards	52,709	55,928
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	141,769	149,479
Deferred Tax Assets, Deferred Income	(9,960)	2,418
Deferred Tax Assets, Operating Loss Carryforwards	2,672,993	2,857,908
Deferred Tax Assets, Capital Loss Carryforwards	111,325	107,009
Deferred Tax Assets, Valuation Allowance	338,508	372,119
Deferred Tax Assets, Other	212,563	220,055
Deferred Tax Assets, Net of Valuation Allowance	4,504,739	4,612,667
Accumulated deferred income taxes and taxes accrued	4,448,761	4,229,615
Deferred Tax Assets, Regulatory Assets and Liabilities	1,394,937	1,247,530
Non-current accrued taxes (including unrecognized tax benefits)	(309,669)	(422,213)
Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	563,423	467,267
Pension, net regulatory asset
Deferred Tax Liabilities, Other	303,007	363,829
Combined unitary state taxes
Deferred Tax Liabilities, Other	3,600	8,783
Power Purchase Agreements
Deferred Tax Liabilities, Other	89,614	75,612
Accumulated storm damage provision
Deferred Tax Liabilities, Other	0	2,474
Deferred fuel
Deferred Tax Liabilities, Other	23,305	69,436
Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	164,685	147,011
Entergy Arkansas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	1,530,196	1,421,272
Deferred Tax Liabilities, Regulatory Assets	219,773	241,427
Deferred Tax Liabilities, Other	24,430	21,187
Deferred Tax Liabilities, Net	2,050,018	1,918,852
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(29,923)	(28,868)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	4,851	4,054
Deferred Tax Assets, Tax Credit Carryforwards	6,360	6,761
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	31,686	23,956
Deferred Tax Assets, Deferred Income	3,546	5,962
Deferred Tax Assets, Operating Loss Carryforwards	126,255	94,321
Deferred Tax Assets, Capital Loss Carryforwards	14,489	7,137
Deferred Tax Assets, Other	11,608	17,072
Deferred Tax Assets, Net of Valuation Allowance	607,426	544,974
Accumulated deferred income taxes and taxes accrued	1,489,169	1,437,053
Deferred Tax Assets, Regulatory Assets and Liabilities	310,621	296,278
Non-current accrued taxes (including unrecognized tax benefits)	(46,577)	(63,175)
Entergy Arkansas [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	185,725	154,106
Entergy Arkansas [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	101,887	96,853
Entergy Arkansas [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	(11,993)	(15,993)
Entergy Arkansas [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		0
Entergy Arkansas [Member] | Deferred fuel
Deferred Tax Liabilities, Other	0	0
Entergy Arkansas [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	127,933	118,301
Entergy Louisiana [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	2,729,299	2,639,079
Deferred Tax Liabilities, Regulatory Assets	497,177	500,395
Deferred Tax Liabilities, Other	106,590	126,952
Deferred Tax Liabilities, Net	3,722,793	3,651,490
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	39,379	46,837
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	7,119	6,078
Deferred Tax Assets, Tax Credit Carryforwards	26,549	27,902
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	59,448	70,297
Deferred Tax Assets, Deferred Income	(24,017)	(20,375)
Deferred Tax Assets, Operating Loss Carryforwards	336,128	459,553
Deferred Tax Assets, Capital Loss Carryforwards	17,029	13,073
Deferred Tax Assets, Other	54,207	52,438
Deferred Tax Assets, Net of Valuation Allowance	1,212,577	1,240,317
Accumulated deferred income taxes and taxes accrued	2,477,954	2,391,442
Deferred Tax Assets, Regulatory Assets and Liabilities	678,086	575,459
Non-current accrued taxes (including unrecognized tax benefits)	32,262	19,731
Entergy Louisiana [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	202,364	173,402
Entergy Louisiana [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	84,732	82,305
Entergy Louisiana [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	97,846	112,292
Entergy Louisiana [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		0
Entergy Louisiana [Member] | Deferred fuel
Deferred Tax Liabilities, Other	4,785	17,065
Entergy Louisiana [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	18,649	9,055
Entergy Mississippi [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	849,623	810,120
Deferred Tax Liabilities, Regulatory Assets	37,374	41,519
Deferred Tax Liabilities, Other	5,231	6,844
Deferred Tax Liabilities, Net	934,386	902,822
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(8,989)	(10,064)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	3,277	3,649
Deferred Tax Assets, Tax Credit Carryforwards	3,355	3,446
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	11,361	10,072
Deferred Tax Assets, Deferred Income	1,274	6,194
Deferred Tax Assets, Operating Loss Carryforwards	305	8,375
Deferred Tax Assets, Capital Loss Carryforwards	8,206	7,613
Deferred Tax Assets, Other	1,096	1,556
Deferred Tax Assets, Net of Valuation Allowance	72,931	85,427
Accumulated deferred income taxes and taxes accrued	870,116	821,744
Deferred Tax Assets, Regulatory Assets and Liabilities	53,046	54,586
Non-current accrued taxes (including unrecognized tax benefits)	(8,661)	(4,349)
Entergy Mississippi [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy Mississippi [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	26,064	24,342
Entergy Mississippi [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	(1,140)	(1,140)
Entergy Mississippi [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		0
Entergy Mississippi [Member] | Deferred fuel
Deferred Tax Liabilities, Other	17,234	21,137
Entergy Mississippi [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	0	0
Entergy New Orleans [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	272,182	272,187
Deferred Tax Liabilities, Regulatory Assets	72,389	23,618
Deferred Tax Liabilities, Other	5,133	4,270
Deferred Tax Liabilities, Net	373,023	323,370
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(19,443)	(19,354)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	1,394	1,268
Deferred Tax Assets, Tax Credit Carryforwards	4,205	4,431
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	23,998	25,846
Deferred Tax Assets, Deferred Income	715	1,045
Deferred Tax Assets, Operating Loss Carryforwards	30,740	26,227
Deferred Tax Assets, Capital Loss Carryforwards	16,220	15,684
Deferred Tax Assets, Other	1,692	(235)
Deferred Tax Assets, Net of Valuation Allowance	148,499	97,833
Accumulated deferred income taxes and taxes accrued	201,541	195,615
Deferred Tax Assets, Regulatory Assets and Liabilities	89,385	42,921
Non-current accrued taxes (including unrecognized tax benefits)	22,983	29,922
Entergy New Orleans [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy New Orleans [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	9,687	9,216
Entergy New Orleans [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	12,385	12,516
Entergy New Orleans [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		0
Entergy New Orleans [Member] | Deferred fuel
Deferred Tax Liabilities, Other	1,247	1,563
Entergy New Orleans [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	(407)	0
Entergy Texas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	727,242	671,072
Deferred Tax Liabilities, Regulatory Assets	100,959	104,562
Deferred Tax Liabilities, Other	4,512	3,301
Deferred Tax Liabilities, Net	854,430	831,589
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(23,403)	(21,977)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	2,596	2,181
Deferred Tax Assets, Tax Credit Carryforwards	1,515	1,672
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	4,358	8,659
Deferred Tax Assets, Deferred Income	7,925	8,365
Deferred Tax Assets, Operating Loss Carryforwards	50	61
Deferred Tax Assets, Capital Loss Carryforwards	1,273	1,655
Deferred Tax Assets, Other	1,189	1,740
Deferred Tax Assets, Net of Valuation Allowance	32,925	43,590
Accumulated deferred income taxes and taxes accrued	868,849	814,905
Deferred Tax Assets, Regulatory Assets and Liabilities	37,325	41,137
Non-current accrued taxes (including unrecognized tax benefits)	(47,344)	(26,906)
Entergy Texas [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy Texas [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	16,569	17,522
Entergy Texas [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	5,148	4,551
Entergy Texas [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		1,387
Entergy Texas [Member] | Deferred fuel
Deferred Tax Liabilities, Other	0	29,194
Entergy Texas [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	97	97
System Energy [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	466,361	450,559
Deferred Tax Liabilities, Regulatory Assets	75,606	76,522
Deferred Tax Liabilities, Other	13,572	9,051
Deferred Tax Liabilities, Net	730,958	694,922
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(24,642)	(2,641)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	515	406
Deferred Tax Assets, Tax Credit Carryforwards	10,724	11,717
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	225	225
Deferred Tax Assets, Deferred Income	0	0
Deferred Tax Assets, Operating Loss Carryforwards	69,611	35,089
Deferred Tax Assets, Capital Loss Carryforwards	10,788	13,211
Deferred Tax Assets, Other	0	0
Deferred Tax Assets, Net of Valuation Allowance	314,242	317,576
Accumulated deferred income taxes and taxes accrued	451,830	405,744
Deferred Tax Assets, Regulatory Assets and Liabilities	229,065	240,310
Non-current accrued taxes (including unrecognized tax benefits)	(35,114)	(28,398)
System Energy [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	175,341	139,858
System Energy [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	0	18,895
System Energy [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	0	0
System Energy [Member] | Accumulated storm damage provision
Deferred Tax Liabilities, Other		0
System Energy [Member] | Deferred fuel
Deferred Tax Liabilities, Other	78	37
System Energy [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	$ 17,956	$ 19,259